Building host tools on Windows

I am trying to build the host tools on Windows, and I have hit a road block. Specifically, I get the output: HOSTCC tools/mkeficapsule tools/mkeficapsule.c:18:10: fatal error: uuid/uuid.h: No such file or directory 18 | #include <uuid/uuid.h>

Steps so far: Download latest msys Double upgrade with "pacman -Syu" pacman -S gcc make bison diffutils openssl-devel pacman -S git git clone from denx.de pacman -S flex (because make complained "flex was missing"

Now I have the above error. I am not familiar with MSYS packages - I have tried "e2fsprogs" and "uuid-dev" but neither are found. Which package do I need to include?

Martin